rogerogers edited a comment on issue #3407: URL: https://github.com/apache/apisix/issues/3407#issuecomment-767254734
> For the "sometimes" problem, you should add more log in the cors plugin, to see what happened when the error occurs. > For example: > https://github.com/apache/apisix/blob/8904011fa8321358b7fb31f612cca887fa23ff28/apisix/plugins/cors.lua#L168 > > > You should log down the `ctx.conf_type`, `ctx.conf_id` and returned `multiple_origin`. ### code * <pre>local multiple_origin, err = core.lrucache.plugin_ctx(lrucache, ctx, nil, create_multiple_origin_cache, conf) local json=require('cjson.safe') core.log.error(json.encode(multiple_origin)) </pre> * <pre>local allow_methods = conf.allow_methods core.log.error(conf.allow_methods.. 'guess') if allow_methods == "**" then allow_methods = "GET,POST,PUT,DELETE,PATCH,HEAD,OPTIONS,CONNECT,TRACE" end core.response.set_header("Access-Control-Allow-Origin", ctx.cors_allow_origins) core.log.error(ctx.cors_allow_origins) </pre> ### logs * 2021/01/26 10:30:38 [error] 3816274#3816274: *1473 [lua] cors.lua:173: phase_func(): {"http:\/\/m-local.guess.com":true,"http:\/\/www-local.guess.com":true} while reading response header from upstream, client: 127.0.0.1, server: , request: "POST /products/comments HTTP/1.0", upstream: "http://127.0.0.1:9505/products/comments";, host: "api-local.guess.com", referrer: "http://m-local.guess.com/detail/"; 2021/01/26 10:30:38 [error] 3816274#3816274: *1473 [lua] cors.lua:131: set_cors_headers(): GET,POST,OPTIONSguess while reading response header from upstream, client: 127.0.0.1, server: , request: "POST /products/comments HTTP/1.0", upstream: "http://127.0.0.1:9505/products/comments";, host: "api-local.guess.com", referrer: "http://m-local.guess.com/detail"; 2021/01/26 10:30:38 [error] 3816274#3816274: *1473 [lua] cors.lua:137: set_cors_headers(): http://m-local.guess.com while reading response header from upstream, client: 127.0.0.1, server: , request: "POST /products/comments HTTP/1.0", upstream: "http://127.0.0.1:9505/products/comments";, host: "api-local.guess.com", referrer: "http://m-local.guess.com/detail"; 2021/01/26 10:30:38 [error] 3816273#3816273: *1469 [lua] cors.lua:173: phase_func(): {"http:\/\/www-local.guess.com":true,"http:\/\/m-local.guess.com":true} while reading response header from upstream, client: 127.0.0.1, server: , request: "POST /products/v3/detail HTTP/1.0", upstream: "http://127.0.0.1:9505/products/v3/detail";, host: "api-local.guess.com", referrer: "http://m-local.guess.com/detail/"; 2021/01/26 10:30:38 [error] 3816273#3816273: *1469 [lua] cors.lua:131: set_cors_headers(): GET,POST,OPTIONSguess while reading response header from upstream, client: 127.0.0.1, server: , request: "POST /products/v3/detail HTTP/1.0", upstream: "http://127.0.0.1:9505/products/v3/detail";, host: "api-local.guess.com", referrer: "http://m-local.guess.com/detail"; 2021/01/26 10:30:38 [error] 3816273#3816273: *1469 [lua] cors.lua:137: set_cors_headers(): http://m-local.guess.com while reading response header from upstream, client: 127.0.0.1, server: , request: "POST /products/v3/detail HTTP/1.0", upstream: "http://127.0.0.1:9505/products/v3/detail";, host: "api-local.guess.com", referrer: "http://m-local.guess.com/detail/"; 2021/01/26 10:30:38 [error] 3816273#3816273: *1538 [lua] cors.lua:173: phase_func(): {"http:\/\/www-local.guess.com":true,"http:\/\/m-local.guess.com":true}, client: 127.0.0.1, server: , request: "OPTIONS /products/recommend HTTP/1.0", host: "api-local.guess.com", referrer: "http://m-local.guess.com/detail"; 2021/01/26 10:30:38 [error] 3816273#3816273: *1538 [lua] cors.lua:131: set_cors_headers(): GET,POST,OPTIONSguess, client: 127.0.0.1, server: , request: "OPTIONS /products/recommend HTTP/1.0", host: "api-local.guess.com", referrer: "http://m-local.guess.com/detail"; 2021/01/26 10:30:38 [error] 3816273#3816273: *1538 [lua] cors.lua:137: set_cors_headers(): http://m-local.guess.com, client: 127.0.0.1, server: , request: "OPTIONS /products/recommend HTTP/1.0", host: "api-local.guess.com", referrer: "http://m-local.guess.com/detail/"; 2021/01/26 10:30:39 [error] 3816276#3816276: *1540 [lua] cors.lua:173: phase_func(): {"http:\/\/m-local.guess.com":true,"http:\/\/www-local.guess.com":true} while reading response header from upstream, client: 127.0.0.1, server: , request: "POST /products/recommend HTTP/1.0", upstream: "http://127.0.0.1:9505/products/recommend";, host: "api-local.guess.com", referrer: "http://m-local.guess.com/detail/"; 2021/01/26 10:30:39 [error] 3816276#3816276: *1540 [lua] cors.lua:131: set_cors_headers(): GET,POST,OPTIONSguess while reading response header from upstream, client: 127.0.0.1, server: , request: "POST /products/recommend HTTP/1.0", upstream: "http://127.0.0.1:9505/products/recommend";, host: "api-local.guess.com", referrer: "http://m-local.guess.com/detail"; 2021/01/26 10:30:39 [error] 3816276#3816276: *1540 [lua] cors.lua:137: set_cors_headers(): http://m-local.guess.com while reading response header from upstream, client: 127.0.0.1, server: , request: "POST /products/recommend HTTP/1.0", upstream: "http://127.0.0.1:9505/products/recommend";, host: "api-local.guess.com", referrer: "http://m-local.guess.com/detail"; * 2021/01/26 10:30:42 [error] 3816275#3816275: *1750 [lua] cors.lua:173: phase_func(): {"http:\/\/m-local.guess.com":true,"http:\/\/www-local.guess.com":true} while reading response header from upstream, client: 127.0.0.1, server: , request: "POST /products/v3/detail HTTP/1.0", upstream: "http://127.0.0.1:9505/products/v3/detail";, host: "api-local.guess.com", referrer: "http://m-local.guess.com/detail/"; 2021/01/26 10:30:42 [error] 3816275#3816275: *1750 [lua] cors.lua:131: set_cors_headers(): GET,POST,OPTIONSguess while reading response header from upstream, client: 127.0.0.1, server: , request: "POST /products/v3/detail HTTP/1.0", upstream: "http://127.0.0.1:9505/products/v3/detail";, host: "api-local.guess.com", referrer: "http://m-local.guess.com/detail"; 2021/01/26 10:30:42 [error] 3816275#3816275: *1750 [lua] cors.lua:137: set_cors_headers(): http://m-local.guess.com while reading response header from upstream, client: 127.0.0.1, server: , request: "POST /products/v3/detail HTTP/1.0", upstream: "http://127.0.0.1:9505/products/v3/detail";, host: "api-local.guess.com", referrer: "http://m-local.guess.com/detail"; 2021/01/26 10:30:42 [error] 3816275#3816275: *1750 [lua] cors.lua:173: phase_func(): {"http:\/\/m-local.guess.com":true,"http:\/\/www-local.guess.com":true} while reading response header from upstream, client: 127.0.0.1, server: , request: "POST /products/v3/detail HTTP/1.0", upstream: "http://127.0.0.1:9505/products/v3/detail";, host: "api-local.guess.com", referrer: "http://m-local.guess.com/detail/"; 2021/01/26 10:30:42 [error] 3816275#3816275: *1750 [lua] cors.lua:131: set_cors_headers(): GET,POST,OPTIONSguess while reading response header from upstream, client: 127.0.0.1, server: , request: "POST /products/v3/detail HTTP/1.0", upstream: "http://127.0.0.1:9505/products/v3/detail";, host: "api-local.guess.com", referrer: "http://m-local.guess.com/detail"; 2021/01/26 10:30:42 [error] 3816275#3816275: *1750 [lua] cors.lua:137: set_cors_headers(): http://m-local.guess.com while reading response header from upstream, client: 127.0.0.1, server: , request: "POST /products/v3/detail HTTP/1.0", upstream: "http://127.0.0.1:9505/products/v3/detail";, host: "api-local.guess.com", referrer: "http://m-local.guess.com/detail/"; 2021/01/26 10:30:43 [error] 3816275#3816275: *1805 [lua] cors.lua:173: phase_func(): {"http:\/\/m-local.guess.com":true,"http:\/\/www-local.guess.com":true} while reading response header from upstream, client: 127.0.0.1, server: , request: "POST /products/recommend HTTP/1.0", upstream: "http://127.0.0.1:9505/products/recommend";, host: "api-local.guess.com", referrer: "http://m-local.guess.com/detail/"; 2021/01/26 10:30:43 [error] 3816275#3816275: *1805 [lua] cors.lua:131: set_cors_headers(): GET,POST,OPTIONSguess while reading response header from upstream, client: 127.0.0.1, server: , request: "POST /products/recommend HTTP/1.0", upstream: "http://127.0.0.1:9505/products/recommend";, host: "api-local.guess.com", referrer: "http://m-local.guess.com/detail/"; 2021/01/26 10:30:43 [error] 3816275#3816275: *1805 [lua] cors.lua:137: set_cors_headers(): http://m-local.guess.com while reading response header from upstream, client: 127.0.0.1, server: , request: "POST /products/recommend HTTP/1.0", upstream: "http://127.0.0.1:9505/products/recommend";, host: "api-local.guess.com", referrer: "http://m-local.guess.com/detail/"; Seems no log when situation occurred ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
